Abstract #4852
A Traveling-Wave Approach to Acoustic Noise Reduction in MR Gradient Coils
Simone Angela Winkler 1 , Andrew Alejski 2 , Trevor Wade 2 , Charles McKenzie 2 , and Brian K Rutt 1
1
Dept of Radiology, Stanford University,
Stanford, California, United States,
2
Robarts
Research Institute, The University of Western Ontario,
London, Ontario, Canada
We present a new wave-based framework for understanding
acoustic noise in MR gradient coils, and propose two new
concepts for acoustic noise reduction. Results of this
wave-based coupled structural-acoustic modeling, as well
as experimental measurements, demonstrate that the
addition of an impedance matching horn and an
absorbing end cap both act to decrease acoustic noise
inside the gradient coil. Simulation results show mean
sound pressure level reductions of 2 dB for horn and end
cap, and 3 dB for both used in combination. Experimental
results show mean SPL reductions of 4 dB for horn and 9
dB for end cap.
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